Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session M25: Microscale Flows: Particle Inertia
8:00 AM–10:10 AM,
Tuesday, November 20, 2018
Georgia World Congress Center
Room: B313
Chair: Mattia Gazzola, University of Illinois Urbana-Champaign
Abstract ID: BAPS.2018.DFD.M25.4
Abstract: M25.00004 : Dynamics of particles in liquid-liquid stratified flow in a microchannel
8:39 AM–8:52 AM
Presenter:
T Krishnaveni
(IIT Madras)
Authors:
T Krishnaveni
(IIT Madras)
T Renganathan
(IIT Madras)
S Pushpavanam
(IIT Madras)
Inertial focusing is a separation technique where particles migrate laterally to equilibrium positions in the presence of finite inertia. These equilibrium positions are predominantly governed by two counteracting forces namely the wall lift force and the shear gradient force. The equilibrium positions can be altered by changing the velocity profile of the fluid. This is done for the separation and recovery of cells from one fluid to the other.
In this work, we model the inertial focusing of particles in the laminar, liquid-liquid stratified flow in a microchannel. The particles are sent through one fluid and due to variation in shear gradient (curvature in velocity profile), the particles migrate towards the other fluid. Towards this, we develop a 2D model (pressure driven flow between infinite parallel plates) based on the immersed boundary method to study the hydrodynamics and particle migration. The effect of fluid and particle properties and the operating conditions such as phase holdup and Reynolds number is analyzed on the particle migration.To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.M25.4
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